2013 Mac Pro
Operating system: Mac OS 10.15.7
Graphics card: AMD FirePro D500 3 GB
Broken: 2.92.0-b379f9348487-, 2.91
With cube selected, create new "Particle Settings" click on "Hair" - Blender quits.
Based on the default startup. File also attached.
File created in 2.901 with hair (rendered as objects) opens and renders fine in 2.91 but cannot be created in 2.91.
Hope this helps. Let me know if you need further information. Thanks!
Further investigation: Seems to be related to displaying the "Hair" paths. If the display tag is turned off "Hair" can be clicked without a crash. If "Render As" is then changed to object the object will be rendered correctly without a crash. Changing "Render As" back to "Path" with the display flag on with crash Blender.